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| 1 | Influence of Shim Layers on Progressive Failure of a Composite Componentin Composite-Aluminum Bolted Joint in Aerospace Structural Assembly显示文摘The influence of varying shim layers on the progressive damage/failure of a composite component in a bolted composite-aluminum aerospace structural assembly was investigated using a non-linear three-dimensional(3 D)structural solid elements assembled model of a carbon fiber-reinforced polymer(CFRP)-aluminum single-lap joint with a titanium(Ti-6 Al-4 V)fastener and a washer generated with the commercial finite element(FE)software package,ABAQUS/Standard.A progressive failure algorithm written in Fortran code with a set of appropriate degradation rules was incorporated as a user subroutine in ABAQUS to simulate the non-linear damage behavior of the composite component in the composite-aluminum bolted aerospace structure.The assembled 3 DFE model simulated,as well as the specimen for the experimental testing consisted of a carbon-epoxy IMS-977-2 substrate,aluminum alloy 7075-T651 substrate,liquid shim(Hysol EA 9394),solid peelable fiberglass shim,a titanium fastener,and a washer.In distinction to previous investigations,the influence of shim layers(liquid shim and solid peelable fiberglass shim)inserted in-between the faying surfaces(CFRP and aluminum alloy substrates)were investigated by both numerical simulations and experimental work.The simulated model and test specimens conformed to the standard test configurations for both civil and military standards.The numerical simulations correlated well with the experimental results and it has been found that:(1)The shimming procedure as agreed upon by the aerospace industry for the resolution of assembly gaps in bolted joints for composite materials is the same for a composite-aluminum structure;liquid shim series(0.3,0.5 and 0.7 mm thicknesses)prolonged the service life of the composite component whereas a solid peelable fiberglass shim most definitely had a better influence on the 0.9 assembly gap compared with the liquid shim;(2)The shim layers considerably influenced the structural strength of the composite component by delaying its ultimate failure thereby increasing its service life;and(3)Increasing the shim layer′s thickness led to a significant corresponding effect on the stiffness but with minimal effect on the ultimate load. | Cephas Yaw Attahu An Luling Li Zhaoqing Gao Guoqiang | 2018 | Transactions of Nanjing University of Aeronautics and Astronautics2018，35，1： | 2 |
| 2 | Parameters affecting the selective filtration of certain tobacco smoke components显示文摘 | Gerald P Morie Cephas H Sloan Madelyn S BaggeR | 1975 | Beitr Tabakforsch lnt1975，8，3： | 1 |
| 3 | A protocol for the initial management of unstable pelvic fractures显示文摘 | Bassam D Cephas GA Ferguson KA | 1998 | Am Surg1998，64，9： | 1 |
| 4 | Aprotocolfor the initial management of unstable pelvic fractures显示文摘 | Bassam D Cephas GA Ferguson KA | 2011 | Am Surg2011，64，14： | 1 |
| 5 | Nitric oxide potentiates acute lung injury in an isolated rabbit lung model显示文摘 | Rayhrer CS Edmisten TD Cephas GA | 1998 | Ann Thorac Surg1998，65，： | 1 |
| 6 | A protocol for the initial man- agement of unstable pelvic fractures显示文摘 | Bassam D Cephas GA Ferguson KA | 1998 | Am Surg1998，64，9： | 1 |
| 7 | Aprotocol for the initial management of unstable pelvic fractures 显示文摘 | Bassam D Cephas GA Ferguson KA | 1998 | Am Surg1998，64，9： | 1 |
| 8 | Interhospital ver- sus direct scene transfer of major trauma patients in a rural trauma system 显示文摘 | YOUNG JS BASSAM D CEPHAS GA | 1998 | Am Surg1998，64，： | 1 |
| 9 | Aprotocol for the initial- man-agement of unstable pelvic fractures显示文摘 | Bassam D Cephas GA Ferguson KA | 1998 | Am Surg1998，64，： | 1 |
| 10 | A protocol for the initial management of unstable pelvic fractures 显示文摘 | Bassam D Cephas GA Ferguson KA | 1998 | Am Surg1998，64，9： | 1 |
| 11 | Comparative analysis of salivary bacterial microbiome diversity in edentulous infants and their mothers or primary care givers using pyrosequencing显示文摘 | Cephas KD Kim J Mathai RA | 2011 | PLoS One2011，6，23： | 1 |
| 12 | Parameters affecting the selective filtration of certain tobacco smoke components显示文摘 | Gerald P Morie Cephas H Sloan Madelyn S Baggett | 1975 | Beitr Tabakforsch Int1975，8，3： | 1 |
| 13 | High-efficiency inverted dithienogermole-thienopyrrolodione-based polymer solar cells显示文摘 | Small Cephas E Chen Song Subbiah Jegadesan | | 0，，02： | 1 |
| 14 | Aprotocolfor the initial management of unstable pelvic fractures显示文摘 | Bassam D Cephas GA Ferguson KA | 2011 | Am Surg2011，64，14： | 1 |
| 15 | Training in Interpersonal Skills for Librarians and Information Workers显示文摘 | Cephas Odini | 1991 | Library Review1991，40，4： | 1 |
| 16 | A protocol for the initial management of unstable pelvic fractures显示文摘 | Cephas GA Ferguson KA | 1998 | Am Surg1998，64，9： | 1 |
| 17 | A protocol for the initial management of unstabal pelvic fractures 显示文摘 | Bassam D Cephas GA Ferguson KA et aL | 1998 | Am Surg1998，64，9： | 1 |
| 18 | The response of Dahl salt-sensitive and salt-resistant female rats to a space flight model显示文摘 | Thierry-Palmer M Cephas S Cleek T | 2003 | J Gravit Physiol2003，10，2： | 1 |
| 19 | A protocol for the initial management of unstable pelvic fractures显示文摘 | Bassam D Cephas GA Ferguson KA | 1998 | Am Surg1998，64，9： | 1 |
| 20 | Asiatic acid-pectin hydrogel matrix patch transdermal delivery system influences parasitaemia suppression and inflammation reduction in P. berghei murine malaria infected Sprague-Dawley rats显示文摘Objective: To report the influence of transdermal delivery of asiatic acid(AA) in Plasmodium berghei-infected Sprague Dawley rats on physicochemical changes, %parasitaemia and associated pathophysiology. Methods: A topical once-off AA(5, 10, and 20 mg/kg)- or chloroquine(CHQ)-pectin patch was applied on the shaven dorsal neck region of Plasmodium berghei-infected Sprague Dawley rats(90-120 g) on day 7 after infection. Eating and drinking habits, weight changes, malaria effects and %parasitaemia were compared among animal groups over 21 d. Results: AA-pectin patch application preserved food and water intake together with %weight gain. All animals developed stable parasitaemia(15%-20%) by day 7. AA doses suppressed parasitaemia significantly. AA 5 mg/kg patch was most effective. AA and CHQ displayed bimodal time-spaced peaks. CHQ patch had a longer time course to clear parasitaemia. Conclusions: AA influences bio-physicochemical changes and parasitaemia suppression in dose dependent manner. In comparison by dose administered, AA has much better efficacy than CHQ. AA may be a useful antimalarial. AA and CHQ displays bimodal peaks suggesting possible synergism if used in combination therapy. | Greanious Alfred Alfrd Mavondo Musabayane Cephas Tagumirwa | 2016 | Asian Pacific Journal of Tropical Medicine2016，9，12： | 0 |
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